GC-MS结合化学计量学方法分析艾叶挥发油成分

Analysis of Essential Oil of Artemisia argyi by GC-MS Method Combined with Chemometrics

为了建立区分艾叶挥发油产地的数学模型,通过GC-MS结合化学计量学的方法,对艾叶挥发油化学成分进行分析,以面积归一化法测定各组分的相对百分含量,并定量研究桉油精、樟脑、龙脑、β-石竹烯、氧化石竹烯等5种代表性成分。水蒸气提取艾叶挥发油中桉油精的含量最高达27.89 mg/g。超临界CO_(2)萃取-分子蒸馏(SFE-MD)得到的艾叶挥发油桉油精含量不高,有较大损失。水蒸气提取挥发油成分多集中在低沸点馏分,高沸点馏分缺失明显。用PCA和OPLS-DA法建模并识别挥发油样品,模型可有效区分汤阴北艾、罗浮山红脚艾等不同品种。同时筛选出标记化合物,对艾叶挥发油鉴别有参考意义。

In order to establish model to distinguish origin of Artemisia argyi essential oil,the combination of GC-MS method and chemometrics was applied to analyze the components of essential oil of Artemisia argyi.Relative percentage of the components was determined by area normalization.Five representative components including cineole eucalyptol,camphor,borneol,β-caryophyllene and caryophyllene oxide were quantitatively studied.The highest content of eucalyptol in the Artemisia argyi essential oil was 27.89 mg/g in the sample of water distillation prepared.Results in the samples obtained by supercritical CO_(2)extraction and molecular distillation(SFE-MD)were not high,which implied a loss in the preparation process.The constituents of the essential oil from water distillation were mainly concentrated in the low boiling point fraction,while the high boiling point fraction was obviously missing.The GC-MS data of essential oils was analyzed by PCA and OPLS-DA methods to classify the samples,resulting with good results.Different varieties of Artemisia argyi could be successfully identified.Potential chemical markers were obtained by screening,which could be used to distinguish the essential oil of Artemisia argyi.